Combine the term Device and Client throughout AdGuard DNS

### Issue Details

Throughout AdGuard DNS with the addition of client, there's probably not much point separating both device and client as they're essentially referring to the same thing.

### Proposed solution

Combine Device and Client together to be something like:
```
Client
Home Router
IP: 2403:580c:ffff:70e8:83f:1341:2852:XXXX
MyCountry
MyISP
```

### Alternative solution

_No response_